> What this means is that if you have multiple receivers waiting for a message
> from a queue and a message arrives then it will be immediately delivered to
> receiver A. Receiver A is now removed from the HashSet, however if receiver
> A finishes its processing and requests another message before another
> message is sent to the queue it will be added back to the HashSet. When the
> next message arrives set will again be sent to receiver A because in the
> HashSets ordering receiver A is clearly ahead of receiver B.
Why a HashSet and not a LinkedList?
--jason
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